diff --git a/Substract.c b/Substract.c
new file mode 100644
index 0000000..17a4da1
--- /dev/null
+++ b/Substract.c
@@ -0,0 +1,25 @@
+// Factorial of n = 1*2*3*...*n
+
+#include <iostream>
+using namespace std;
+
+int factorial(int);
+
+int main() {
+    int n, result;
+
+    cout << "Enter a non-negative number: ";
+    cin >> n;
+
+    result = factorial(n);
+    cout << "Factorial of " << n << " = " << result;
+    return 0;
+}
+
+int factorial(int n) {
+    if (n > 1) {
+        return n * factorial(n - 1);
+    } else {
+        return 1;
+    }
+}